Greek sprinters Costas Kenteris and Katerina Thanou are expected to learn on Tuesday if they face bans for missing pre-Olympics doping tests.
The International Association of Athletics Federations (IAAF) spokesman Nick Davies said a hearing would be held later in the day to determine any action. No public announcement is expected until Wednesday.
The pair were charged this month with missing tests just before the Athens Games in August. Both have sent explanations to the IAAF.
"I'm not expecting a public announcement until tomorrow (Wednesday). Both athletes and their lawyers have to be contacted (over the result) and one is in the United States," Davies said.
Kenteris, the 2000 Olympic 200 metres champion, and Thanou, the women's 100m silver medallist from the same Games in Sydney, also face a criminal hearing in Greece over the missed tests.
They failed to appear to give samples in Chicago and Tel Aviv shortly before the 2004 Games and again in Athens on August 12, the eve of the opening ceremony.
Greek prosecutors have also charged them with faking a midnight motorcycle crash which led to them spending four days in hospital as the IAAF sought to question them. Some medical staff have been charged with writing false medical reports.
They could be banned for up to two years but can appeal the IAAF's decision to sport's ultimate appeals tribunal, the Court of Arbitration for Sport.
